Spring and frame supporter.



1. DOTTL.

SPRING AND FRAME SUPPORTER.

APPLICATION FILE'D IUNE 3.19M}.

1,287,917. Patented Dec. 17, 1918.

3n umlfoz Jive a6 470/17 UNITED STATES PATENT oFFIoE. I

JOSEPH DOTTL, OF MADISON, WISCONSIN, ASSIGNOR TO THE DO'I'TL MANUFACTURING COMPANY, OF MADISON, WISCONSIN, A CORPORATION OF WISCONSIN.

SPRING AND FRAME SUPPORTER.

Application filed June 3. 1918.

b all whom it may concern:

Be it known that I, JOSEPH Do'r'rp, c1t1- zen of the United States, and residing at Madison, in the county of Dane and State of Wisconsin, have invented a new and Improved Spring and Frame Supporter, of which the following is a specification.

The present invention relates to the type of device shown and claimed in my U. S. Letters Patent Reissue No. 14324, June 26, 1917, and No. 1266231, May 14, 1918. Its object is to simplif the construction, in respect to both manu acture and assembly, and to stiffen the springs against swaying.

To these ends it consists in a base mounted on the haunch of the main arch spring, and extending lengthwise of the latter for a considerable distance, and having rigid therewith an upstanding pin received in a helical spring whereby the end portion of the bolster is supported. It also consists in a device of this nature wherein the exterior diameter of the pin at the base is substantially the same as the internal diameter of the spring and wherein the pin tapers toward the top to allow free play of the upper end of the spring.

Another feature of the invention resides in a lug with which the base is provided and which is arranged to be bent over on the lower turn of the corresponding spring to hold the latter in place.

In the drawings, Figure 1 is an elevation of the rear axle, spring and bolster of a well known type of motor vehicle, showing a preferred embodiment of the invention. Fig. 2 is an enlarged fragmentary transverse vertical section corresponding thereto. Fig. 3 is an inverted plan view of the base for the auxiliary spring. Fig. 4 is a perspective view showing a modification. Fig. 5 is an inverted plan view of the base shown in Fig. 4.

The wheels 1, axle housing 2, spring shackles 3, main leaf spring 4, and channeled bolster 5, are of ordinary construction, the bolster being secured to the spring by the center bolt 6 and clips 7. It will be observed that the end portions of the upper leaf of the spring lie fiat on the next lower leaf, that is, the ends of the upper leaf are not curled.

Resting directly on the upper and second leaves are the cast bases 10 the lower sides of which are preferably hollowed out as Specification of Letters Patent.

Patented Dec. 17, 1918.

Serial No. 237,955.

shown and have near their upper ends lugs or projections 11 arranged to be received in corresponding holes or depressions in the upper leaf. The bases are reinforced along their upper sides by ribs 12 notched to receive the bolts 13 that pass through the ends of the U-shaped straps 14. The bolts and straps constitute clips that together with the pins 11 rigidly hold the bases in position on the haunches of the spring.

Below the ribs 12, the bases form seats 15 surrounding the upstanding tapered pins 16 which are preferably several inches in height and serve to hold the helical springs 18, by which they are surrounded, substantially vertical. Lugs 19 are preferably formed on the bases and when knocked over on the lower turn of the spring serve as a means for positively retaining the latter in place. The upper ends of the springs are loosely received in the channeled end portion of the bolster, as shown in Fig. 2.

The construction is exceedingly cheap since it requires substantially no machinery, and possesses, moreover, the advantage of being readily assembled without detaching the bolster. Under all ordinary loads it acts to resiliently support the ends of the latter, but in cases of overload or heavy shock, said ends may be depressed far enough to rest directly on the upper ends of the pins. 1

In the modification shown in Figs. 4 and 5, the base 20 is positioned on the lower side of the pin 21 and has ribs 22 notched at 23 to receive the bolt of the clip 1314 as before. The pin 11 is in this instance replaced by a groove 24 which is adapted to receive the curl 25 on the upper leaf of the spring. The bendable lug 26 corresponds to the lug 19.

I claim 1. In combination with an arched main spring and shackles whereby said spring is suspended at its ends, a bolster U-shaped in cross-section and embracing the central portion of the main spring and extending longitudinally thereof, a tapering upstanding pin rigidly supported on the main spring below the end of the bolster, and a helical spring surrounding the pin and extending upwardly therefrom and having its upper end received directly in the channel of the bolster, the lower end of said pin being of substantially the same diameter as the internal diameter of the spring, the pin extending above the normal mid-point of the spring.

2. In combination with an arched mainspring, a bolster fixed centrally thereto and having a U-shaped, downwardly opening.

channel formed in its outer end portion, a base extending a considerable distance longitudinally of the main spring and fixed there-' ing its upper end received directly in the channel 111 the bolster, saidba'se andbolster iormlngthe sole-means for maintaining the spring in proper alinementcopies of nearer? 3. in combination with an arched 'main spring and a bolster fixed centrally thereto, bases extending"considerable distances along the upper surfaces of the haunches of the springi andfixed thereto, said bases having rigid therewith upstanding tapering pins, and helical springs surrounding the pins and having their upper ends bearing-directly on the lowen surface of the bolster, the

length of the pins being such that the bolster rests on their-upper ends when it is depressed by heavy. loads or shocks, sald base and'bolster "forming the sole means :for

maintaining "the spring in proper alinement.

JOSEPH; DOTTL.

Commissioner or Eatents'; 

